CAJ | 학술논문

勘探实践表明中国西南的镇雄－赫章地区下寒武统筇竹寺组页岩气成藏条件优越，受强改造与高演化制约，筇竹寺组页岩气勘探尚未获得突破。为寻找热演化程度相对较低的有利保存区，基于钻井、露头、地震资料，通过编制关键期次岩相古地理图及古地质图，结合各沉积-剥蚀分区典型埋藏史分析，精细刻画镇雄－赫章地区沉积-剥蚀分区特征。结果表明：镇雄－赫章地区发育加里东期－海西期古隆起，控制二叠纪前沉积充填过程，沉积-剥蚀差异性明显。其中Ⅰ区及Ⅱ区缺失层系较多，且热演化间断时间长，热演化程度相对较低，为筇竹寺组页岩气有利勘探区。古隆起及周缘地区为海相高演化页岩气勘探的有利指向。
감탐실천표명중국서남적진웅－혁장지구하한무통공죽사조혈암기성장조건우월，수강개조여고연화제약，공죽사조혈암기감탐상미획득돌파。위심조열연화정도상대교저적유리보존구，기우찬정、로두、지진자료，통과편제관건기차암상고지리도급고지질도，결합각침적-박식분구전형매장사분석，정세각화진웅－혁장지구침적-박식분구특정。결과표명：진웅－혁장지구발육가리동기－해서기고륭기，공제이첩기전침적충전과정，침적-박식차이성명현。기중Ⅰ구급Ⅱ구결실층계교다，차열연화간단시간장，열연화정도상대교저，위공죽사조혈암기유리감탐구。고륭기급주연지구위해상고연화혈암기감탐적유리지향。
The exploration practice shows that the shale gas accumulation condition of the Lower Cambrian Qiongzhusi Formation in the Zhenxiong-Hezhang area is superior.Being limited in the strong transformation and high maturity,the shale gas exploration in Qiongzhusi Formation has not been won a breakthrough.In order to search out the favorable preservation areas with relatively low thermal evolution degree,based on the drilling,outcrop and seismic data,through plotting the lithofacies-paleogeographic map and ancient geological map of the key periods,and combined with the analysis of the typical buried history of every deposition-denudation division,this paper describes the characteristics of the sedimentary-denudation divisions in the Zhenxiong-Hezhang area.The results show that there develops the Caledonian-Hercynian ancient uplift in this area,which controls the sedimentary process before Permian and that the deposition-denudation difference is obvious.In District Ⅰ and District Ⅱ,there is lack of more strata,the thermal evolution intermittent time is long,and the Permian thermal evolution degree is relatively low,so District Ⅰ and District Ⅱ are the favorable exploration areas of the shale gas in Qiongzhusi Formation.The ancient uplift and peripheral regions are the favorable targets for the explorating the highly mature shale gas.